System for registering telephone-calls.



B. L. BUXBAUM.

SYSTEM FOR REGISTERING TELEPHONE CALLS. APPLICATION FILED 111m. 5, 1910.

Patented Apr. 18,1911.

Wneas e6 EMANUEL L. BUXBAUM,

OF CHICAGO, ILLINOIS.

SYSTEM FOR REGISTERING TELEPHONE-CALLS.

To all whom it may concern:

Be it known that I, EMANUEL L. BUX- BAUM, a citizen of the United States, residing at Chicago, county of Cook, State of Illinois, have invented a certain new and useful Improvement in Systems for Registering Telephone-Calls, and declare the following tobe a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

My invention, specifically considered, relates to telephone systems and has for its object to provide a reliable system for accurately registering the number of out-going calls.

A further object of my invention is to provide means for simultaneously registering out-going calls from a subscribers station at the subscribers station and at the central station without making it possible for the instrument at the central station to register a larger number of calls than those shown by the subscribers instrument.

A further object of my invention is to provide a simple and novel system for accurately registering calls both at a central station and ata subscribers station, without making it possible for the operator to actuate the registers when the subscribers telephone is not in use.

The various features of novelty whereby my invention is characterized will hereinafter he pointed out with particularity in the claims; but for a full understanding of my invention and of its object and advantages, reference may be had to the following detailed description taken in connection with the accompanying drawing, wherein:

Figure 1 is a diagram illustrating one form of my invention; and Fig. 2 is a diagram illustrating a modification.

Referring to Fig. 1, A represents a reg ister at a central station and B a register at a subscribers station. A and B are actuating magnets for the registers A and B, respectively. The arrangement shown is that in which there are three wires, C, D and E in the telephone system between the central station and the subscribers station and I have therefore arranged the parts of the registering system so as to utilize these wires. The terminals of the magnet A are connected to wires C and E respectively.

Specification of Letters Patent.

Application filed August 5, 1910.

Patented Apr. 18, 1911.. Serial No. 575,621.

The terminals of the magnet B are connected to wires C and D respectively. C, D and E represent supply conductors which carry the current for telephoning and signaling. C and I) represent supply conductors which carry the current for registering purposes, these conductors being connected respectively to the line wires C and D. F is a controller at the central station, this conveniently taking the form of a switch controlling the supply wires C and D G is a switch actuated with the register at the subscribers station and arranged to connect the wires D and E together when the magnet B is energized and the register B actuated. H is a switch associated with the register at the central station and is constructed and arranged to close a circuit through a lamp I or other indicator when the instrument at the central station is operated. K represents the telephone at the subscribers station, and L a circuit breaker associated with the telephone and arranged in the wire G. The circuit breaker may of course take any usual form, that illustrated being one which is normally open and which is adapted to be closed by the hook 7c of the telephone when the receiver is removed from the hook.

The operation is as follows: As long as the receiver is on the hook the controlling system for the registers is inoperative. As soon as the subscriber removes the receiver from the hook the circuit breaker is closed and then, upon closing the switch F at the central station, current flows from conductor 0 through conductor O, through the cut-out box M, through the circuit breaker, through the coil of electro-magnet B, through the conductor D and cut-out box and back to supply conductor D Thus the electromagnet B is energized and the reg ister B is actuated. As soon as this occurs the switch G is closed and conductors D and E are connected together so that current can then pass from conductor C through conductor 0, through the coil of electromagnet A, through conductor E, cut-out box, switch G, conductor D, and back to supply conductor D Thus the electromagnet A is energized and the register A at the central st-ationactuated. The actuation of the register at the central'station causes the switch H to be closed and the lamp to be lighted. As soon as the lamp is lighted the switch F is opened or permitted ductor D to open and the power for the registering circuit is cut off. It will thus be seen that no registration can be made as long as the receiver is upon the hook at the subscribers station, and that no registration can be made at the central station until the registration has been actuated at the subscribers station. Furthermore, the lamp or other signal at the central station gives a positive indication to the operator that both reg isters have been actuated.

In Fig. 2 I have shown an arrangement wherein the controlling system is modified to adapt it to a two wire telephone system. In this figure A and B represent the registers at the central station and at the subscribers station respectively. C and D are the two telephone wires. A is the actuating magnet for the register A, this magnet be ing so constructed and arranged that it will not operate unlessthere is considerable current flowing through the same; this being conveniently efiected by making the coil of few turns and of low resistance. B is the actuating coil of the magnet for the register at the subscribers station. This coil is so arranged that it will be energized sufficiently to actuate the register with a much less current than that required to energize the magnet at the central station. E is a holding coil for maintaining the register B in the position brought about by the energization of the actuating coil. The terminals of the actuating coil are connected to the conductors C and D after they have passed through the cut-out boX M. One terminal of the holding coil is connected to the conductor D and the other is connected to the conductor C through a switch G similar to the switch G in the other form. II and I" represent a controlling switch and a signal associated with the register at the central station and corresponding to the parts H and I in Fig. 1. C and D are supply conductors for furnishing the current to actuate the registers, these conductors being connected to. the wires C and D respectively. The coil A is in series with the conductor D. F is a controller corresponding to the controller F in Fig. 1. K is a telephone at the subscribers station, is the telephone hook and L is the circuit breaker which, in this case, is arranged to make and break the continuity of the wire 0".

The operation isv as follows: When the receiver is removed from the hook and the switch F closed, current flows from supply conductor (1*, wire 0 cut-out M, circuit breaker L, actuating coil B wire D coil A at the central station and back to con- The current flowing through the controlling system is sufficient to energize the actuating coil at the subscribers station so as to; cause the register to be actuated, but it is not enough to energize the magnet at the central station. As soon as the subscribers register is operated, the switch G is closed and the holding coil is thrown across the circuit in multiple. with the actuating coil. The parts are so proportioned and the potential of the supply circuit is such that. the current is now increased in volume sufliciently to energize the magnet at the central station, so that the register at the central station is actuated. The holding coil prevents the register at the subscribers station from returning to its normal position until the circuit is broken at the controlling switch at the central station or at the circuit breaker at the subscriberstelephone, so that there is no danger of causing the register at the subscribers station from being operated more than once when the switch is closed at the central station. Furthermore, as in the other form of my invention, it is necessary that the register at the subscribers station be operated before a registration can be made. at the centralstation, so that the reading at the central station can never be greater than that at the subscribers station. The arrangement which I have shown at the subscribers station avoids the breaking of a circuit at this point and thus avoids injury to the contacts and lessens the need for in spection and repair. It will of course be understood, however, that various other arrangements may be employed which will cause the subscribers register to be actuated under a small current and which will then increase the volume of the current and cause the register to be held in its actuated position while the register at the central station is actuated.

lVhile I have illustrated and described with particularity only a single form of my invention I do not desire to be limited to the specific details so illustrated and described; but intend covering all constructions and arrangements which fall within the terms employed in the definitions of my invention constituting the appended claims.

hat I claim is:

1. In combination with a telephone system, a registering instrument at a central station, a registering instrument at a subscribers station, and actuating means controllable from the central station for causing said instruments to be actuated, said actuating means including means controlled by the instrument at the subscribers station for governing the actuation of the instrument at the central station.

2. In combination with a telephone system, a registering instrument at a central station, a registering instrument at a subscribers station, an electro-magnetic actuating means associated with each of said instruments, a controlling system for said actuating means ineluding a controller at the central station, and means associated with the instrument at the subscribers station for governing said controlling system so as to govern the actuation of the instrument at the central station.

3. In combination with a telephone system, a registering instrument at a subscribers station a re isterin instrument at I 7 a: a

a central station, an electro-magnetic actuating device associated with each of said instruments, a controlling system for said actuating devices including a controller at the central station, and a switch controlled by the instrument at the subscribers station for varying the circuit conditions in said controlling system.

4. In combination with a telephone system, a registering instrument at a subscribers station, a registering instrument at a central station, an electro-magnetic actuating device associated with each of said instruments, a controlling system for said actuating device including a controller at the central station, said controlling system being connected with the actuating device at the subscribers station so as to energize the same when the controller at the central station is operated, and means associated with the instrument at the subscribers station for. changing the circuit conditions in said controlling system so as to cause the actuating device at the central station to be energized.

In combination with a telephone sys tem, a registering instrument at a subscribers station, a registering instrument at a central station, an electro-magnetic actuating device associated with each of said instruments, a controlling system for said devices including a controller at the central station, said controlling system being connected to the actuating device at the subscribers station so as to energize the same when the controller is operated, means associated with the instrument at the subscribers station for varying the circuit con ditions in said controlling system upon the actuation of the device at the subscribers station to produce an energization of the actuating device at the central station, a signal at the central station, means for causing said signal to be operated upon the actuation of the latter instrument.

6. In combination with a telephone system having a telephone at a subscribers station, a registering instrument at the subscribers station, aregistering instrument at the central station, an electro-magnetic actuating device associated with each of said instruments, a controlling system for said actuating device including a controller at the central station, a switch actuated with the telephone at the subscribers station for rendering said controlling system inoperative when the receiver is hung up, said controlling system being connected to the actuating device at the subscribers station so as to energize the same when the controller at the central station is operated, and means associated with the instrument at the subscribers station for varying the circuit conditions in said controlling system upon the actuation of the latter instrument so as to produce an energization of the actuating device at the central station.

7. In combination with a telephone system, a register at a subscribers station, an actuating magnet for the register, a controlling system for said magnet extending to the central station, a controller in said system at the central station, a signal at the central station, and means associated with said register for controlling said signal.

In testimony whereof, I sign this specification in the presence of two witnesses.

E. L. BUXBAUM.

Witnesses:

NM. F. FREUDENREIOH, RUBY V. BRYDGES.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). G. 

